What rock is used to make medicene?

Various rocks and minerals are used in the production of medicine, with the most notable being talc and certain clays. Talc is often used as a lubricant and filler in pharmaceutical tablets, while clays like bentonite have applications in drug formulation due to their absorbent properties. Additionally, some minerals contain compounds that serve as active ingredients in medications, such as lithium from certain rock formations used to treat Bipolar disorder.